DS31256 datasheet(110/183 Pages) MAXIM

No de pièce	DS31256

Description	256-Channel, High-Throughput HDLC Controller

PDF	183 Pages

Scroll/Zoom	100%

Fabricant	MAXIM [Maxim Integrated Products]

Site Internet	https://www.maximintegrated.com/en.html

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110 / 183 page

DS31256 256-Channel, High-Throughput HDLC Controller

110 of 183

Figure 9-12. Transmit DMA Packet Handling

Buffer 1

Packet 1

1st Descriptor

(EOF=0/CV=0)

Buffer 2

Packet 1

2nd Descriptor

(EOF=0/CV=0)

Buffer 3

Packet 1

Last Descriptor

(EOF=1/CV=1)

Buffer 1

Packet 2

Last Descriptor

(EOF=1/CV=0)

Buffer 1

Packet 3

1st Descriptor

(EOF=0/CV=0)

Buffer 2

Packet 3

2nd Descriptor

(EOF=0/CV=0)

Buffer 3

Packet 3

Last Descriptor

(EOF=1/CV=1)

Buffer 1

Packet 4

Last Descriptor

(EOF=1/CV=0)

Buffer 1

Packet 5

Last Descriptor

(EOF=1/CV=0)

Buffer 1

Packet 6

1st Descriptor

(EOF=0/CV=0)

Buffer 2

Packet 6

2nd Descriptor

(EOF=0/CV=0)

Buffer 3

Packet 6

Last Descriptor

(EOF=1/CV=0)

PV=1

Next Pending

Descriptor Pointer

stored within the

Packet Descriptor

Last Pending Descriptor Pointer

Next Pending Descriptor Pointer

Next Descriptor Pointer

Start Descriptor Pointer

Next Pending

Descriptor Pointer

stored within the

Packet Descriptor

Transmit DMA Configuration RAM

Packet Chain

Column 1

Packet Chain

Column 2

Packet Chain

Column 3

Packet Chain

Column 4

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